From patchwork Fri Dec 4 14:17:37 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Deepak M X-Patchwork-Id: 7766311 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id A2D36BEEE1 for ; Fri, 4 Dec 2015 08:43:40 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E7D25204A0 for ; Fri, 4 Dec 2015 08:43:39 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 2329B20498 for ; Fri, 4 Dec 2015 08:43:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7F3446EDE5; Fri, 4 Dec 2015 00:43:38 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 9A8C26EDE5 for ; Fri, 4 Dec 2015 00:43:37 -0800 (PST) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga101.fm.intel.com with ESMTP; 04 Dec 2015 00:43:36 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,380,1444719600"; d="scan'208";a="864515836" Received: from mdeepakubuntudesk01-desktop.iind.intel.com ([10.223.26.119]) by orsmga002.jf.intel.com with ESMTP; 04 Dec 2015 00:43:35 -0800 From: Deepak M To: intel-gfx@lists.freedesktop.org Date: Fri, 4 Dec 2015 19:47:37 +0530 Message-Id: <1449238659-12473-1-git-send-email-m.deepak@intel.com> X-Mailer: git-send-email 1.9.1 Cc: Gaurav K Singh Subject: [Intel-gfx] [PATCH 1/3] drm/i915: Add DPI FIFO empty status check X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-1.2 required=5.0 tests=BAYES_00, DATE_IN_FUTURE_03_06, RCVD_IN_DNSWL_MED,T_RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=no version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Gaurav K Singh After sending SHUTDOWN or TURN ON packet,check the DPI FIFO empty status. Signed-off-by: Gaurav K Singh Tested-by: Mika Kahola --- drivers/gpu/drm/i915/intel_dsi.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c index 170ae6f..5c5b59a 100644 --- a/drivers/gpu/drm/i915/intel_dsi.c +++ b/drivers/gpu/drm/i915/intel_dsi.c @@ -222,6 +222,12 @@ static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs, else cmd |= DPI_LP_MODE; + mask = DPI_FIFO_EMPTY; + + if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & mask) + == mask, 50)) + DRM_ERROR("Timeout waiting for DPI FIFO empty\n"); + /* clear bit */ I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT);